Question

which federal policy was enacted during world war ii and justified as a wartime necessity? a ban on german-language books internment of japanese americans exclusion of chinese immigrants adoption of the quota system of immigration

Explanation:

During World War II, the U.S. government ordered the forced relocation and internment of over 120,000 Japanese Americans, most of whom were U.S. citizens, citing "wartime necessity" and fears of espionage. The other options are incorrect: the ban on German-language books was not a formal federal policy; the Chinese Exclusion Act was passed in 1882; the immigration quota system was established in the 1920s, all outside of WWII.

Answer:

internment of Japanese Americans